Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed✔ FIXED
- Tapatalk connection is currently broken✔ FIXED
- Avatars cannot be uploaded✔ FIXED

The data from the review between quart and PT was pretty crappy too. +/-20 watts or so. But looking at the min/max deviations doesn't tell the whole story. I don't use a power meter so I can't really comment on how this affects the actual usage for training.

Stages responded page 4 of this thread.. Reasonable answers on some of the questions and some questions they can't answer this quick... ( got to love the "internet" ) I think this is going to very interesting to see how it plays out....

Stages' response is far from reasonable. They claim they see good agreement, but show no data. In contrast, Ray did some excellent data analysis both on the trainer and on the road, providing an excellent power reference in the LeMond trainer (which should at least produce constant power @ constant speed, even if the power estimate it provides has a speed-dependent offset), and verifying his analysis with Robert Chung and Tom Anhalt, both of whom have been analyzing power data for many years and know what they're doing. It's well documented L-R balance is variable. Data from Polar/Look, from Vector prototypes, and from the literature all confirm this. Rainmaker's results were very much expected.

so are the stages shipping units yet? any word from users in the real world?

edit: @djconnell, I just read your post over at RBR - hadn't thought of issues relating to power issues occurring when cadence issues occur but you're exactly right. i get the sense that an accelerometer based cadence sensor would not be that hard to confuse (similar to the "cadence" sensor in a powertap i would imagine).

somewhat related - i wonder how power accuracy is affected by 1 Vs 2 or more reed switches for cadence, or whether a full-on encoder to give real time crank position and velocity would provide any real-world benefits...

We are doing our own testing. Our data looks a bit different. To be honest, ours looks better, and thanks to Chung and Anhalt's work we know what specific abnormality to look for (although we are also looking for others, or course). Will be a little while before we feel comfortable publishing anything, though.

Rainmaker does truly excellent work, but in this case I think it would have been worth trying additional units, and maybe another set of legs. Quite the death sentence to pronounce based on a single unit. It's possible that either our unit is better (it has brand new firmware) or my legs are more even (previous testing has indicated I'm within about 1.5% left to right, even well into a LT test.)

so are the stages shipping units yet? any word from users in the real world?

edit: @djconnell, I just read your post over at RBR - hadn't thought of issues relating to power issues occurring when cadence issues occur but you're exactly right. i get the sense that an accelerometer based cadence sensor would not be that hard to confuse (similar to the "cadence" sensor in a powertap i would imagine).

somewhat related - i wonder how power accuracy is affected by 1 Vs 2 or more reed switches for cadence, or whether a full-on encoder to give real time crank position and velocity would provide any real-world benefits...

Two wouldn't help much, since pedaling 2-legged, there's surges in torque for each leg, and in low-inertial situations that can cause accelerations (cadence increases) twice per pedal stroke. Now 4 magnets... that would be nice.

I put about 12k miles on my quarq last year and have a little less than 2k miles riding on both a stages unit (I was lucky enough to get early) along with the quarq. Anecdotal, but at this point I feel the Stages unit is as consistent as the quarq.

As far as riding, I've been doing a mix of intervals, hill repeats, steady efforts and some groups rides which are all over the place. I generally watch 3sec and 30sec power and then compare avg power at the end of the ride.

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